Culms 0.9-1.5 m tall, stout, obtusely 3-angled, acutely 3-angled just basal to inflorescence. Leaves longer than culm; sheath 5-7.5 cm; leaf blade 0.8-1.4 cm wide, flat, stiff, abaxial midvein and margin scabrous. Involucral bracts 7, leaflike, overtopping inflorescence, abaxial midvein and margin scabrous. Inflorescence a large terminal decompound anthela; rays many, scabrous; first rays to 9 cm, stout, 3-angled. Spikelets sessile, in headlike clusters of 3-7, ellipsoid to oblong, 4-6 × 2-3 mm, many flowered, apex obtuse to rounded. Glumes brown with dark brown short lines, deltoid-ovate, ca. 1.5 mm, membranous, 5-veined, apex rounded. Perianth bristles 2 or 3, white, slightly longer than nutlet, erect, apically sparsely antrorsely scabrous. Stamens 2. Stigmas ?2. Nutlet yellow, broadly ellipsoid to subspherical, ca. 1.5 mm, biconvex, densely minutely verruculose. Fl. and fr. Mar-Apr.
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